Imaging subsurface lithological and structural features by resistivity tomography: North Beagle Channel (Tierra del Fuego, Argentina)

Worldwide, the study of fold and thrust belts and characterization of structures are mainly carried out through superficial geological observations and seismic reflection, as the main geophysical prospecting method. In this study we show how the resistivity method is a useful tool for identification...

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Detalles Bibliográficos
Autores principales: Tassone, Alejandro Alberto, Santomauro, Melina Gisela, Cerredo, Maria Elena, Remesal, Marcela Beatriz, Lippai, Horacio Francisco, Vilas, Juan Francisco A.
Publicado: 2010
Materias:
Argentina
Electrical resistivity tomography
Fuegian Andes
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10268774_v27_n3_p562_Tassone
http://hdl.handle.net/20.500.12110/paper_10268774_v27_n3_p562_Tassone
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_10268774_v27_n3_p562_Tassone
record_format dspace
spelling paper:paper_10268774_v27_n3_p562_Tassone2023-06-08T16:00:17Z Imaging subsurface lithological and structural features by resistivity tomography: North Beagle Channel (Tierra del Fuego, Argentina) Tassone, Alejandro Alberto Santomauro, Melina Gisela Cerredo, Maria Elena Remesal, Marcela Beatriz Lippai, Horacio Francisco Vilas, Juan Francisco A. Argentina Electrical resistivity tomography Fuegian Andes Worldwide, the study of fold and thrust belts and characterization of structures are mainly carried out through superficial geological observations and seismic reflection, as the main geophysical prospecting method. In this study we show how the resistivity method is a useful tool for identification of shallow structures (upper 80 m) when combined with the knowledge of the local geology. This is a relative low cost and easily applicable method, which can contribute to image both lithological boundaries and subsurface structures. The Andes Fueguinos in the area of the Beagle Channel are characterized by a sequence of NN-Everging thrusts stacks of basement emplaced during the middle Cretaceous-Tertiary Andean orogenesis, combined with a strong left lateral strike-slip component. An electric resistivity survey to obtain a 2D electric resistive tomography (ERT) was carried out in the northern shore of the Beagle Channel, west of Ushuaia, in order to better understand the geometric relationships between the basement and cover units in this part of the thrust belt. The method employed, integrated with a field geological survey, allowed to differentiate the electrical signatures of different thin sheets of the thrust belt, where the major faults are recognized by a decrease in resistivity values and sharp lateral variations. Furthermore, the resistivity section shows a good spatial correspondence with a geological section of the study area, where the continuity of the tectonic boundary between the basement (Lapataia Formation) and synrift units (Lemaire Formation) could be followed at depth. Fil:Tassone, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Santomauro, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cerredo, M.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Remesal, M.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Lippai, H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Vilas, J.F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10268774_v27_n3_p562_Tassone http://hdl.handle.net/20.500.12110/paper_10268774_v27_n3_p562_Tassone
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Argentina
Electrical resistivity tomography
Fuegian Andes
spellingShingle Argentina
Electrical resistivity tomography
Fuegian Andes
Tassone, Alejandro Alberto
Santomauro, Melina Gisela
Cerredo, Maria Elena
Remesal, Marcela Beatriz
Lippai, Horacio Francisco
Vilas, Juan Francisco A.
Imaging subsurface lithological and structural features by resistivity tomography: North Beagle Channel (Tierra del Fuego, Argentina)
topic_facet Argentina
Electrical resistivity tomography
Fuegian Andes
description Worldwide, the study of fold and thrust belts and characterization of structures are mainly carried out through superficial geological observations and seismic reflection, as the main geophysical prospecting method. In this study we show how the resistivity method is a useful tool for identification of shallow structures (upper 80 m) when combined with the knowledge of the local geology. This is a relative low cost and easily applicable method, which can contribute to image both lithological boundaries and subsurface structures. The Andes Fueguinos in the area of the Beagle Channel are characterized by a sequence of NN-Everging thrusts stacks of basement emplaced during the middle Cretaceous-Tertiary Andean orogenesis, combined with a strong left lateral strike-slip component. An electric resistivity survey to obtain a 2D electric resistive tomography (ERT) was carried out in the northern shore of the Beagle Channel, west of Ushuaia, in order to better understand the geometric relationships between the basement and cover units in this part of the thrust belt. The method employed, integrated with a field geological survey, allowed to differentiate the electrical signatures of different thin sheets of the thrust belt, where the major faults are recognized by a decrease in resistivity values and sharp lateral variations. Furthermore, the resistivity section shows a good spatial correspondence with a geological section of the study area, where the continuity of the tectonic boundary between the basement (Lapataia Formation) and synrift units (Lemaire Formation) could be followed at depth.
author Tassone, Alejandro Alberto
Santomauro, Melina Gisela
Cerredo, Maria Elena
Remesal, Marcela Beatriz
Lippai, Horacio Francisco
Vilas, Juan Francisco A.
author_facet Tassone, Alejandro Alberto
Santomauro, Melina Gisela
Cerredo, Maria Elena
Remesal, Marcela Beatriz
Lippai, Horacio Francisco
Vilas, Juan Francisco A.
author_sort Tassone, Alejandro Alberto
title Imaging subsurface lithological and structural features by resistivity tomography: North Beagle Channel (Tierra del Fuego, Argentina)
title_short Imaging subsurface lithological and structural features by resistivity tomography: North Beagle Channel (Tierra del Fuego, Argentina)
title_full Imaging subsurface lithological and structural features by resistivity tomography: North Beagle Channel (Tierra del Fuego, Argentina)
title_fullStr Imaging subsurface lithological and structural features by resistivity tomography: North Beagle Channel (Tierra del Fuego, Argentina)
title_full_unstemmed Imaging subsurface lithological and structural features by resistivity tomography: North Beagle Channel (Tierra del Fuego, Argentina)
title_sort imaging subsurface lithological and structural features by resistivity tomography: north beagle channel (tierra del fuego, argentina)
publishDate 2010
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10268774_v27_n3_p562_Tassone
http://hdl.handle.net/20.500.12110/paper_10268774_v27_n3_p562_Tassone
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